Liquid dispensing gun



LIQUID DISPENSING GUN Filed March 14. 1931 $3 za 3:: 0 28 .30 29 31 "-1 29 3., 1} Jwmmlw I r 44 44 ,Fred Izl'aden I In the drawing:

' ferent position; I

Patented July 19, 1932 i a i v UNITED STATES PATENT OFFICE- Application filed March-14, 1931. Serial no; 522,621;

The invention forming the subject matter the lower face of cap 7 to make a liquidof this application is an improvement on tight joint between the cap. and container. the gun for applying liquid to dandelions, It will be obvious from Figurel that when disclosed in my copending application Serial the cap 7 is screwed onto the part 5 at the v 5 No. 486,484, filed October 10,1930. upper part thereof, it will be positioned on Themain object of the present invention the end of the container 1 by turning the is to simplify the instrument described 1n handle 6 so that the screwthreads of the the said application by reducing the number part 5 and the hub'4 pull the cap down of parts and designing the assembly so as tightly on the upper end of the container 1. 10 to make such parts more readily accessible The upperend of the handle 6 is bent to for assembly and repair. form a part 11, to which 'is'suitably secured Other objects of the invention will become a ,handgrip 12. The upper end of the bent apparent as the detailed description thereof part 11 is screwthreaded'to receive a small o d I valve casing l3, having, an aperture 14 at v one end thereof and shaped, to form a seat Figure 1 is a central vertical section, for a small ballvvalve 15. o lengthwise of the instrument; I The ball valve 15 is normally held in aper- Figure 2 is a fragmentary section showture closlng position by means of a weak coil ing some of the parts of Figure 1 in a difsprlng 16, having one end thereof engaging V p the ball 15, while the other end abuts against Figure 3is a horizontal section takenon an annular nut screwthreaded on the inner the line'33 of Figure 2; end of the valve casing 13. This annular nut Figure 4 is a horizontal section takenon is designated in Figure 1 by the reference the line 44 of Figure 2; v V numeral 17. e

Figure 5 is aperspective View of a valve The lower end of thecontainer 1 is closed forming part of this invention; and by a cylindrical nut 18,. which is welded or Figure 6 is a fragmentary elevation, with otherwise suitably secured to the said lower parts shown in section, of a modified form end. Aboss 19 is formed centrally on the v of the invention. v lower part of the nut 18 and is externally 30 As shown in the drawing, the preferred screwthread-ed 'to receive the internally form of the invention comprises a cylindri screwthreaded upper end of the cylinder 20, cal container 1, having a flanged diaphragm a gasket 21 being interposed between the 2, suitably secured therein and near the upper upper end of the cylinder 20 and the lower end thereof. The diaphragm 2 is provided face of the [nut 18.. The nut 18 is axially 35 with apertures 3 to permit liquid to flow bored to form an aperture 22 adapted to reto the lower side thereof when introduced ,ceive a valve pin 23, formed at the'upper end at the top of the container 1. The center of a valve plug 24, which is square in cross part of the diaphragm% is provided with section. a downturned hub 4 which is internally Coaxially with the aperture 22 the nut 18 screwthreaded to receive the external threadis provided with a large bore 25 in which the ed part5 of a hollowhandle 6, which exsquare part of the plug 24', fits snugly, but tends upwardly and j axially of the conslidably. The bore 25 is longer than the plug tainer 1. V 24 and has a compression spring 26 seated The screwthreaded part 5 has a cap 7 setherein, withfone end against the bottom of cured thereto by means of an internally the plug 24 and the other end supported by screwthreaded flange 8; and this cap is proan annular nut 27 screwthreaded intothe boss vided with a do-wnturned flange 9 fitting 19 concentrically with the bore 25. t snugly around the upper end of the con- The lower end ofthe cylinder 20is retainer 1, a gasket 10 being interposed beduced to form a pa'rt28, which is internally tween the upper end of the container 1 and screwthreaded to receive a packing nut 29,

7 adapted to compress packing 30 in order to provide a fluid-tight joint for the lower tubular part 31 of a piston 32, which is slidably mounted in the wider part of the cylinder 20.

which is similar in every respect to the valve" shown in Figure 5. The centralbore 37 of the piston 32, is internally screwthreaded to receive the external screwthreads of a small cylinder 38 which is centrally bored to, receive slidably'the valve plug The upper end of the cylinder 38 extends across the top of the valve plug 36 and is provided with a central aperture 39 toreceive the valve pin 40 formed on the upper end of the valve plugfl36. A coil spring 41 surrounds the cylinder 38,. and has its opposite ends abutted against the lower face of the boss 19, and the-upper end of the piston 32 to force the valve member 34 normally against the splaye' d seat 33, formed at the lower end of the cylinder 20;

The lower end of the piston 32,. where it joins the member 34, is provided with dis charge apertures 42 ,and the tubular part 31 is provided at its upper end immediately below the member 34, with a discharge aperture 43. The lower end ofthe tubular part 31 is externally screwthreadedto receive a flanged nut 44, which is provided With a central bore 45 to form a nozzle for the gun.

The nozzle nut 44 is 's'crewthreaded to re ceive a conical bonnet 46 which is adapted to be placed over a dandelion or other plant intended to receive a discharge of poisonous liquid in order to kill the plant and destroy its pollenation or other reproductive medium which is usually located in the heart of the plantk The form of. the invention shown in Figures 1 and 2 is the preferred form; and the arrangement of the handle at the upper end makes it a very convenient instrument for the purpose described. However, where it is desired; to use a larger container, a larger cylinder 47 may be substituted for the con; tainer 1. In this case, a handle 48 may be secured.to the side of thecylinder 20, and the cylinder 47 may be provided with a check valve 49 to control the admission of air to the dispensing part of theapparatus While a not shown in this figure, it must be underthe container 1 is filled with liquid, and that the bonnet 46 has been applied to a plant for the purpose of spraying into it liquid from the container 1, it will be obvious that as the piston 32 is moved toward the container 1 against the compression of the spring 41 the liquid surrounding the spring 41 will cause the upper valve plug 24. to close the aperture 22, and will force the valve plug 36' into open position as shown in Figure 1. This movement forces liquid from the upper part of the cylinder 20 above the piston 32 out through the aperture 42 into the lower part of the cylinder 20 and around the tubular part 3 1.-

. The upper movement of the piston 32' is stopped by contact between'the upper end of the cylinder 38' and the lower end of the boss 19. Just as soon. as pressure is released on the bonnet 46', the coil spring 41 forces the piston 32 toward'the' dis charge end of the cylinder 20, and until. the valve part 34 contacts with the splayed seat 3'3J Wl1ile moving from the innermost position to the,

stop position against the splayed seat 33', the

liquid becomes discharged through the aperpositions depending upon the filling and dis- 2 charge movement of the nozzle 45. g

The handle 6, with the cap secured thereto, forms a very convenient means for closing the upper end of the container and renders the gun capable of. use without a person having to use both hands for this purpose.

The diaphragm 2, in conjunction with the cap 7, forms a very strong brace for the handle 6' and makes a very rigid connection between the said handleand the container '1;

ment of the quantities which may be discharged at each operation from the container 1. Obviously, themovement of this cylinder 38 into or out of the plug 32,. will regulate the upward movement of the plug .32 and will cause the corresponding variation inthe quantity of liquid being discharged.

What I claim is: i V 1. A dispensing gun comprising acylindrical container, a tubular handle having a cap secured thereto to closeone end of. said container, a check valve at the outer end of said handle, a cylinder connected to the other end of said container, and check valve mechanism in said cylinder to control the discharge of liquid from said container in predetermined quantities.

2. A dispensing gun comprising a container, a cylinder detachably connected to one end of said container, a piston slidably mounted in said cylinder and having a tubular discharge member projecting axially therefrom, a packing gland on the lower end of said cylinder for said member, and oppositely acting check valves one in said container and the other in said cylinder to con- 1 trol the discharge of liquid from said container through said member.

3. A dispensing gun comprising a container, a tubular handle extending from the upper end of said container and having a check valve at the other end thereof, a cylinder connected to the other end of said container, valve mechanism slidably mounted in said cylinder, and having a part projecting to one end of said cylinder, and a conical bonnet secured to the discharge end of said mechanism.

4. A dispensing gun comprising a container having a diaphragm secured thereto and between the ends thereof, a handle detachably connected to said diaphragm and having a cap secured thereto to close one end of said container, a cylinder detachably secured to the other end of said container, a piston slidably mounted in'said cylinder, and

having a tubular member extending coaxially therefrom and projecting from one end of said cylinder, a valve seat being formed on the lower end of said cylinder, a valve formed on the upper end of said tubular member to correspond with said seat, and yielding mechanism in said cylinder and one end of said container for controlling the discharge of liquid from the container through said tubular member.

49 5. A dispensing gun comprising a container, a tubular handle extending from one end of said container and having an air control check valve at the outer end thereof, mechanism controlling the discharge of liquid from said container, and includinga tube mounted to slide relative to said container, a discharge nozzle detachably connected to one end of said tube and a conical outwardly splayed bonnet detachably connected 59 to said nozzle.

In testimony whereof I aflix my signature.

FRED I. JADEN. 

